渗硼时间对45钢固体粉末渗硼渗层组织与性能的影响  

Microstructure and Properties of Boride Layer of 45 Steel Under Different Solid Boronization Time

作　　者：吴开阳[1] 崔霞[1] 欧阳德来[1] 周贤良[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《热加工工艺》2011年第24期182-184,224,共4页Hot Working Technology

基　　金：江西省自然科学基金资助项目(2010GQC0170);江西省教育厅科技项目(GJJ11524)

摘　　要：以45钢为基材对其表面进行固体粉末渗硼,探讨渗层生长行为及渗硼时间与渗层组织及性能的关系。结果表明,渗硼层由硼化物Fe2B构成,硼化物以长短不齐的方式垂直楔入基体形成连续针齿状层,与基体牢固结合。随渗硼时间延长,渗层厚度先快速增大后缓慢增加。渗层生长动力学符合抛物线规律。渗层显微硬度随渗层深度增加,先开始有所增加,后出现明显降低,最后缓慢降低。延长渗硼时间,渗硼深度增加,且显微硬度和耐磨性均能增加。The pack boronization experiment was carried out on 45 steel surfaces with method of solid powder boronization, and the growth behavior of boronization layer and the relationship between microstructure and properties of boride layer and boronization time were investigated. The results show that the boride layer consists mainly of Fe：B. Boride vertically wedge matrix forming a continuous layer, is firmly bonded to matrix. With boronization time increases, the thickness of boride layer increases rapidly first, then slowly increases. The growth kinetic of boride layer shows parabolic law. With boride layer thickness increasing, the microbardness of boride layer increases first, then decreases obviously and finally decreases slowly. With boronization time increasing, the thickness of boride layer increase; the hardness and wear resistance also increase.

关 键 词：固体粉末渗硼 渗层生长行为 组织性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]